EP2002162B1 - Fluidleitung und flexibles leitungsrohr für eine fluidleitung - Google Patents

Fluidleitung und flexibles leitungsrohr für eine fluidleitung Download PDF

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Publication number
EP2002162B1
EP2002162B1 EP07724063A EP07724063A EP2002162B1 EP 2002162 B1 EP2002162 B1 EP 2002162B1 EP 07724063 A EP07724063 A EP 07724063A EP 07724063 A EP07724063 A EP 07724063A EP 2002162 B1 EP2002162 B1 EP 2002162B1
Authority
EP
European Patent Office
Prior art keywords
section
conduit
smooth
pipe
pipe sections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07724063A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2002162A2 (de
Inventor
Manfred Krauss
Sören Schröter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraenkische Rohrwerke Gebr Kirchner GmbH and Co KG
Original Assignee
Fraenkische Rohrwerke Gebr Kirchner GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraenkische Rohrwerke Gebr Kirchner GmbH and Co KG filed Critical Fraenkische Rohrwerke Gebr Kirchner GmbH and Co KG
Priority to PL07724063T priority Critical patent/PL2002162T3/pl
Publication of EP2002162A2 publication Critical patent/EP2002162A2/de
Application granted granted Critical
Publication of EP2002162B1 publication Critical patent/EP2002162B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses
    • F16L33/20—Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of tools; Arrangements using such members
    • F16L33/207—Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
    • F16L33/2071—Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/903—Corrugated

Definitions

  • the present invention relates to a fluid line, as can be used for example in motor vehicles to supply liquid for cleaning the vehicle window or cleaning the vehicle headlight. Furthermore, the present invention relates to a flexible conduit which can be used in such a fluid conduit.
  • a fluid line in which a flexible conduit comprises a plurality of alternating corrugated pipe sections around smooth pipe sections.
  • This conduit made of flexible plastic material in a continuously running extrusion process is used to guide liquid from a liquid reservoir to the spray nozzles of a windshield or headlight washer system in a motor vehicle.
  • this is approximately centrally separated in a smooth pipe section, so that two pipe sections are formed, each of which ends with a smooth pipe section, which is about half as long as the smooth pipe sections, basically on such flexible conduit are available.
  • the spray nozzle or an element to be coupled with such a smooth pipe section can then be inserted into such a smooth pipe section.
  • a fluid line in particular for use in motor vehicles for supplying liquid for vehicle window cleaning or to A motor vehicle headlamp cleaning, comprising a flexible conduit having a plurality of corrugated pipe sections and a plurality of smooth-pipe sections, at least one line connector with a conduit pipe connection portion which is inserted into a smooth-pipe section and for each line connector, a support sleeve which surrounds the plain pipe section receiving the smooth pipe section and the Glattrohrabrough pressed against the conduit connection section.
  • a line connector to be coupled with a smooth-tubular section of a flexible conduit tube is not merely pushed into or pushed onto the latter. Rather, by using a support sleeve associated with such a line connector, it is ensured that the portion of the flexible conduit pipe to be coupled to the line connector, ie a smooth tubular section, is pressed firmly against the conduit connection section.
  • the support sleeve ensures the firm connection, the flexible conduit of less solid, for example, but more flexible material can be constructed, which is advantageous in terms of manufacturing costs and excludes the risk of kinking of the flexible conduit due to rigid material.
  • the support sleeve provides a substantial contribution to the fixed connection between the flexible conduit and a line connector, it can further be provided that the smooth-tube section has a predetermined length which is shorter than the length of the conduit connection section introduced into it ,
  • the support sleeve with a first sleeve section surrounds the smooth-tube section and with a second sleeve section on which there is no contact with the smooth-tube section covered area of the conduit connection section abuts.
  • the entire length of the conduit connection section can be used to establish a firm connection between the flexible conduit and the conduit connector.
  • the flexible conduit comprises a plurality of corrugated pipe sections and / or a plurality of smooth pipe sections, wherein corrugated pipe sections and smooth pipe sections alternately to each other consequences. It can then be further provided that all smooth pipe sections of the flexible conduit have substantially the predetermined length.
  • the flexible conduit can be constructed, for example, of polypropylene material. This means that comparatively inexpensive construction material is used for the flexible conduit, which continues to provide good ductility due to its high flexibility.
  • the support sleeve made of polyamide material, preferably PA-6, is constructed.
  • the lead connector may be constructed of polyoxymethylene material (POM).
  • POM polyoxymethylene material
  • the ratio of the corrugated pipe section length to the smooth pipe section length is greater than 1.2.
  • Such flexible conduits are, as already stated, generally produced by extrusion in a continuous production process.
  • the transition from smooth-pipe sections to corrugated pipe sections is critical here, since there is the danger of the formation of thin areas with bubble inclusion and thus a deterioration in quality.
  • an inner diameter of the first inner shaft of the corrugated pipe section following the smooth pipe section is greater than the inner diameter of inner shafts of the corrugated pipe section which are further away from the smooth pipe section.
  • the flexible conduit has a plurality of corrugated pipe sections and a plurality of smooth pipe sections, corrugated pipe sections and smooth pipe sections follow each other alternately and wherein the ratio of the corrugated pipe section length to Glattrohrabitessin greater than 1.2.
  • a ratio of these lengths has proven to be greater than 2.5, but preferably less than 4.
  • the upper limit for the ratio of the length of the corrugated pipe sections to the length of the smooth pipe sections ensures that smooth pipe sections are sufficiently available between individual corrugated pipe sections. This also allows the construction of comparatively short fluid lines from a flexible conduit made in a continuous process. As already stated above, it is particularly advantageous if the flexible conduit is made of polypropylene material.
  • the inner diameter of the smooth pipe sections in the range of 4 to 5 mm. It has been found that with such a dimension sufficient cavity for conveying liquid to the spray nozzles of a windscreen washer system is provided, of course, taking into account the prevailing pressure ratios in such systems.
  • a flexible conduit according to the invention is to be used for supplying fluid to the spray nozzles of a headlamp washing system, so it is particularly advantageous if the inner diameter of the smooth pipe sections in the range of 8 to 9 mm.
  • a larger volume for the passage of the liquid to be delivered is provided, which is particularly advantageous because in headlight washing systems within a relatively short time, a large pressure must be built, which requires correspondingly larger volumes, as for example in the field of windscreen washer Case is.
  • the inner diameter of the corrugated pipe sections is smaller than the inner diameter of the smooth pipe sections.
  • the fluid line according to the invention and the flexible conduit according to the invention for such a fluid conduit can not only be used to supply liquid for motor vehicle window cleaning or motor vehicle headlight cleaning, but also for guiding gases or gas mixtures, for example air or / and mixtures of air with other gases, for example for aeration and / or venting.
  • a fluid conduit is generally designated 10.
  • This fluid line 10 can be used for example to promote in motor vehicles fluid from a liquid reservoir to the spray nozzles of a windshield washer or a headlight washer. It should be noted here that of course the use in other areas, for example, for fuel line or for conducting gaseous media, is conceivable. Of course, the use in other areas than in motor vehicles is conceivable.
  • the fluid line 10 comprises a flexible conduit 12, which is already connected in the illustrated example at its end portion 14 with a line connector 16 and which is in its end portion 18 prior to connection to a line connector 20.
  • the flexible conduit 12 has a plurality of corrugated pipe sections 22 and smooth pipe sections 24.
  • the corrugated pipe sections 22 and the smooth pipe sections 24 follow each other alternately.
  • the flexible conduit 12 is made for example of polypropylene material and thus has a comparatively cost-effective construction on a high flexibility.
  • This flexible conduit 12 can be manufactured in an extrusion process as an endless tube, and the then required to build a specific fluid line length can be cut from a wound example, on a roll tube.
  • the flexible conduit 12 when the flexible conduit 12 is to be coupled to a respective conduit connector 16, 20 at both end regions 14 and 18, the required length is separated from the remaining strand such that at each end region 14, 18 there is a smooth tube portion 24 which is described hereinafter is then coupled with a respective line connector 16 or 20 is to be described manner.
  • a corrugated pipe section 22 In order to then use the remaining part of the flexible conduit in a corresponding manner, a corrugated pipe section 22 must first be separated from this, so that this part starts again with a smooth pipe section. If such a flexible conduit 12 is used, for example, to construct a fluid line 10, which is to be used for supplying liquid to the spray nozzles of a windscreen washer, the flexible conduit 12 can be made with dimensions that are particularly advantageous for this purpose.
  • the total length L of a length section of the flexible conduit tube 12 comprising a corrugated pipe section 22 and a smooth pipe section 24 is in the range of approximately 25 mm, wherein advantageously the length I of a smooth pipe section 24 is approximately 7 mm ,
  • the inner diameter dg of a smooth tube section 24 or all smooth tube sections 24 in the range of 4.7 mm, while providing a sufficient wall thickness or stability in the smooth tube sections 24, the outer diameter Dg in this range can be about 6 mm.
  • the minimum inner diameter dw of a respective corrugated pipe section 22 may be about 4.5 mm, so is generally slightly smaller than the inner diameter dg of a smooth pipe section 24, while the maximum outer diameter Dw of the corrugated pipe section 22 may be about 7.1 mm.
  • a flexible conduit 12 results which, on the one hand, provides sufficient volume to be able to conduct the required amount of liquid under the prevailing pressure conditions to the spray nozzles of a windscreen washer system.
  • this ratio has a value of about 2.5. The larger this ratio is, the greater the length proportion of the corrugated pipe sections 22 and thus also the flexibility of the conduit 12.
  • the corrugated pipe sections 22 are too long, this entails problems with the requirement to construct comparatively short fluid conduits, since a separation the flexible conduit generally only in the range of smooth pipe sections 24 is possible or useful.
  • the smooth tube portions 24 may have an inner diameter dg of 8.5 mm and an outer diameter Dg of 10.5 mm.
  • the corrugated pipe sections 22 may have a minimum inner diameter dw of 7.5 mm and a maximum outer diameter Dw of 12.75 mm.
  • the length of the corrugated tube sections 22 may then be in the range of 15 mm for such a larger-sized flexible conduit 12, while the smooth-tube sections 24 may have a length I in the region of 12 mm.
  • the line connector 20 which is essentially divided into two areas.
  • a conduit fitting section 26 is for coupling to the flexible conduit 12 while over a shoulder region 28 adjoining the conduit connecting portion 26 connecting portion 30 serves to couple the line connector 20 and the entire fluid line 10, for example, to a fluid pump, a fluid reservoir or other system areas.
  • the conduit connection section 26 is structured in a wave-like manner on its surface 32 and provides a shoulder 34 in its free end region.
  • the flexible conduit 12 for producing the fluid conduit is provided so that it has in its respective end regions, here in the end region 18, a complete smooth tube section 24.
  • this smooth-tubular section 24 or all smooth-tube sections 24 present on the flexible conduit 12 have a length that is significantly shorter than the length of the conduit connection section 26 of the conduit connector 20.
  • the conduit connector 20 with its conduit connection section 26 in the end region 18 provided smooth tubular section 24 inserted so far that it is only in this smooth tube section 24, but no longer engages in the then following corrugated pipe section 22, the results in the Fig. 4 recognizable situation in which this smooth tubular section 24 covers only a portion of the conduit connection section 26.
  • the smooth tube sections 24 are designed to ensure sufficient flexibility comparatively short and, moreover, the flexible conduit 12 made of very elastic material, so for example polypropylene material is constructed for fixed coupling of the flexible conduit 12 with the line connector 20 is still a support sleeve 36 is provided , This is in the illustrated embodiment example dimensioned so that it is longer than the smooth tubular section 24.
  • the support sleeve 36 is the smooth tubular section 24 overlapping on the outer surface and thus presses it reinforced against the conduit connection section 26.
  • the support sleeve 36 extends beyond the smooth tube section 24, preferably up to the shoulder 28 formed on the line connector 20. With this second sleeve section 40, the support sleeve 36 abuts against the outer surface of the conduit connection section 26 and covers it.
  • the support sleeve 36 is made of compared to the construction material of the flexible conduit substantially stronger, more rigid material, such as polyamide material, and since this support sleeve 36 is dimensioned so that when inserting the line connector 20 in the smooth tube section 24 and support sleeve 36 Composite of the smooth tubular section 24 is pressed radially outward against the inner surface of the first sleeve portion 38, thus a very firm and above all fluid-tight connection of the flexible conduit 12 is made to the line connector 20 even at relatively high ambient temperatures.
  • the support sleeve on its inner surface one or more radially inwardly directed bulges, for example in the form of kugelkalottenartigen bulges or elongated ribs or the like, which are dimensioned so that they under slight pressure on the outer surface of a smooth tubular section 24th abut, in the prepared connection state with the line connector 20, however, the functionality of the support sleeve, so the pressing of the smooth tubular section 24 on the outer surface of the conduit connection section 26, do not affect.
  • the fixed coupling of the flexible conduit 12 to one or more line connectors 16 and 20, despite relatively short designed smooth tube sections 24 by the use of the support sleeve 36 is stable and in particular at not complete coverage of the conduit connection section 26 through a smooth pipe section 24 realized optically appealing coupling, in which not the visual appearance may arise that due to a not completely inserted into the flexible conduit 12 conduit connection section 26, the flexible conduit 12 has at least partially detached from the line connector 20.
  • this type of coupling the use of a flexible material constructed and due to its shape, ie the provision comparatively short smooth pipe sections, very flexible conduit possible. This is of particular advantage in particular in the above-mentioned applications, which then comes even further when such a fluid conduit is used to convey fluid to a spray nozzle attached to a moving windshield wiper.
  • FIG Fig. 5 An alternative embodiment variant of a flexible conduit 12 is shown in FIG Fig. 5 shown. It can be seen here that the transition of a smooth tubular section 24 to a corrugated pipe section 22 with the first two inner shafts 42, 44 following the smooth tubular section 24 is evident. It can be seen that the first inner shaft 42 of the corrugated pipe section 22 following the smooth tubular section 24 has an inner diameter dw 1 which is slightly smaller is greater than the inner diameter dw 2 of the second inner shaft 44 and then the following inner shafts. By this gradual decrease of the inner diameter dw of the inner shafts in the direction of a respective smooth pipe section 24, it is ensured that in the manufacturing process in the transition region from the smooth pipe section 24 to the corrugated pipe section 22 no thin areas arise which the structural strength of the flexible.
  • Conduit could affect 12.
  • the minimum inner diameter dw in the corrugated tube section 22 which can be provided, for example, from the second inner shaft 44, in the range of 7.5 to 7.8 mm
  • the inner diameter dw 1 of the first inner shaft 42 at about 8 to 8 , 1 mm so still be slightly smaller than the inner diameter dg of the smooth tube section 24, which may be in the range of 8.3 to 8.5 mm.
  • a corresponding diameter graduation can of course also be provided with flexible conduits 12 having different dimensions.
  • a fluid conduit according to the invention or a flexible conduit constructed in accordance with the invention can be designed differently than shown above.
  • the support sleeve 36 could have a length which substantially corresponds to the length of the latter to be fixed to a line connector 20 smooth tubular section 24. This is especially useful if, in adaptation to certain smooth pipe section lengths I also shorter Conduit connection sections 26 are used on specially designed line connectors 20 are used.
  • the smooth-tubular section 24 is pressed firmly against the outer circumference of the conduit-connection section 26 by the comparatively rigid and heat-insensitive, shorter-shaped support sleeve 36.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Joints Allowing Movement (AREA)
EP07724063A 2006-04-05 2007-04-05 Fluidleitung und flexibles leitungsrohr für eine fluidleitung Not-in-force EP2002162B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07724063T PL2002162T3 (pl) 2006-04-05 2007-04-05 Przewód płynowy i giętka rura przewodowa dla przewodu płynowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006005545U DE202006005545U1 (de) 2006-04-05 2006-04-05 Fluidleitung und flexibles Leitungsrohr für eine Fluidleitung
PCT/EP2007/003122 WO2007115800A2 (de) 2006-04-05 2007-04-05 Fluidleitung und flexibles leitungsrohr für eine fluidleitung

Publications (2)

Publication Number Publication Date
EP2002162A2 EP2002162A2 (de) 2008-12-17
EP2002162B1 true EP2002162B1 (de) 2011-08-17

Family

ID=38331691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07724063A Not-in-force EP2002162B1 (de) 2006-04-05 2007-04-05 Fluidleitung und flexibles leitungsrohr für eine fluidleitung

Country Status (8)

Country Link
US (1) US8230885B2 (pl)
EP (1) EP2002162B1 (pl)
AT (1) ATE520916T1 (pl)
DE (1) DE202006005545U1 (pl)
ES (1) ES2367873T3 (pl)
MX (1) MX2008012777A (pl)
PL (1) PL2002162T3 (pl)
WO (1) WO2007115800A2 (pl)

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Also Published As

Publication number Publication date
ES2367873T3 (es) 2011-11-10
PL2002162T3 (pl) 2012-01-31
WO2007115800A3 (de) 2008-04-24
WO2007115800A2 (de) 2007-10-18
EP2002162A2 (de) 2008-12-17
DE202006005545U1 (de) 2007-08-16
US8230885B2 (en) 2012-07-31
US20090308479A1 (en) 2009-12-17
ATE520916T1 (de) 2011-09-15
MX2008012777A (es) 2009-01-28

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